Refactor SyncBackendHost

chrome/chrome_browser.gypi

 # Copyright 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2251 matching lines @@
         'browser/sync/glue/session_data_type_controller.cc',
         'browser/sync/glue/session_data_type_controller.h',
         'browser/sync/glue/session_model_associator.cc',
         'browser/sync/glue/session_model_associator.h',
         'browser/sync/glue/shared_change_processor.cc',
         'browser/sync/glue/shared_change_processor.h',
         'browser/sync/glue/shared_change_processor_ref.cc',
         'browser/sync/glue/shared_change_processor_ref.h',
         'browser/sync/glue/sync_backend_host.cc',
         'browser/sync/glue/sync_backend_host.h',
+        'browser/sync/glue/sync_backend_host_core.cc',
+        'browser/sync/glue/sync_backend_host_core.h',
+        'browser/sync/glue/sync_backend_host_impl.cc',
+        'browser/sync/glue/sync_backend_host_impl.h',
         'browser/sync/glue/sync_backend_registrar.cc',
         'browser/sync/glue/sync_backend_registrar.h',
+        'browser/sync/glue/sync_frontend.h',
+        'browser/sync/glue/sync_frontend.cc',
         'browser/sync/glue/sync_start_util.cc',
         'browser/sync/glue/sync_start_util.h',
         'browser/sync/glue/synced_device_tracker.cc',
         'browser/sync/glue/synced_device_tracker.h',
         'browser/sync/glue/synced_session.cc',
         'browser/sync/glue/synced_session.h',
         'browser/sync/glue/synced_session_tracker.cc',
         'browser/sync/glue/synced_session_tracker.h',
         'browser/sync/glue/synced_tab_delegate.cc',
         'browser/sync/glue/synced_tab_delegate_android.cc',
@@ skipping 1448 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }